Plate for air filters



Dec. 1, 1931. w. L-. RICHARDS ET AL 1,834,534

PLATE FOR AIR FILTERS Filed June 15, 1929 i i i L 5 17 i 14 Q 4; J W17llbi l 116 QQQQQKDQQQQQQQ- m QOCDOQQQOOOQQ DQQQCDQCDQOQQQQ avwemtoz 5.-Wu LMM L. Riel/Mo;

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Loursvlmin, xmwstraight vertical passages for. the downward PatentedDec. '1, 1931.;

ILL-rm 1.. iarcnnms, or Yoax, assrcnons r 'aimarcan am rucxr, Aconromrxon or nnnawm FILTER COMPANY, 01'

l 1 1mm FOR ant rim'lms Application filed June 18,

flow of a cleaning and charging fluid during the operation\of cleaningsaid medla. Frequently screens are provided in the front of "said;eliminator plates, to prevent the ingress of larger objetts which mightclog the med1a and sometimes in back of said media to protect the samefrom injury, or for other purposes.

.The object of this invention is to provide eliminator plates havingself-contained separatorswhich will hold said plates approximately, in.parallel position with uniform spacing and also of such form'that saidseparators will serve as a substitute for screens either inthe front orthe'back ofsaid filter media or both.

One feature of the invention is its flexibility. If screens are desiredin front and in back of themedia, they are provided by the use of.perforated upturned or bent marginal flanges of the eliminator plates,preferably bent at right angles tofront and back faces ofsaid-eliminator plates thus holding them uniformly separated, as well asacting as screens.

'If a screen is desired for the front pnly said perforated separatorflanges are used only at one side of the eliminator plates and theopposite side is spaced uniformly by the use of othermeans, as in theform herein shown by separators punched from the faces of the eliminatorplates. p If no screen atall is desired the spacing is accomplished bthe use of tab separators only, punched rom the faces of said eliminatorplates as desired. 7

In order that the invention may be clearly understood and readilycarried into effect, the

1929. Serial ir -amiss.

same will now be described more fully, with reference 'to theaccompanying drawings illustrating a preferred embodiment thereof, inwhich drawings:

Fig. 1 isa fragmentary view in transverse section showing a number ofour improved filter units assembled in operative relation with .a siderail orbar of an associated supporting frame, of any suitableconstruction.

Fig. 2 is a rear elevation of a portionof a filter made according to ourinvention.

Fig. 3 is a detail perspective of aportion of our improved sheet metalfilter unit.

Fig. 4 is a to view of a nu'mber of improved filter umts showing aslightly modified form of construction in which lugs or fingers arestruck up from the walls of the units to provide spacing means and onlyone piarforated flange is provided on the entering si e. I

"Fig. 5 is a detail perspective of a portion of one of the filter unitsshown in Fig. 4 of the drawings.

In thedrawings the numeral designates a side rail or bar of a supportingframe for a number of filter units 11, here shown as consisting of sheetmetal bent to form a plurality o faces orsurfaces plates or webs 12 13which, when thesaid units are in assembled position,"as-in- 'Figs. 1 and2 of the drawings, are held in parallel spaced relation to provideindirect or tortuous air spaces or passages 14 extending the width ofthe filter structure.

The means for maintaining the bent plates in uniform spaced relationcomprises prefer-.

ably right angularly bent front and rear marginal flanges 15 and 16preferably in which rows of holes or openings 17 are punched to providepassages for the ingress of air to be purified and for the egress ofpurified air.

In another form of our invention we may eliminate the rear spacingmarginal flanges 16 and provide other means for spacing the rearportions of the filter units, said means comprising lugs or fingers 18struck up from the plates or webs 12.

Of course it will be understood that the spacing apertured flanges 15and 16 and the spacing lugs '18 may be made separate from the plates 12and welded or riveted thereto,

if desired.

Changes and variations may be made in the construction of the parts ofour invention, and we reserve our rights to any and all such changes asare within the spirit of the invention and the scope of theappendedclaims.

What we claim is:

1. An air filter embodying a frame and a 1 series of plates havingangularly bent flange portions to maintain them in spaced relation saidflange portions being perforated an said plates being bentlongitudinally to provide indirect air passages.

2. An air filter embodying a frame and a series of longitudinally bentplates having angularly bent side flanges provided with a line ofperforations, said flanges each bearing on a neighbor plate to formindirectair passages v horizontally through the filter structure.

3. An air filter comprising a frame and a plurality of deformed plateseach presenting a succession of air contacting surfaces in angularrelation to each other and a flange integral therewith for spacing saidplates, said flange having spaced openings and being arranged with itsouter edge engaging a portion of an adjacent plate.

4. An air filter comprising a frame and a plurality of plates deformedlongitudinally to present a succession of air contacting surfacesdisposed in angular relation to each other and a'spacing flange integraltherewith Fand projectingfrom an edge'thereof, said flange havingopenings for the passage of air and being arranged with its outer edgeengaging a portion of an adjacent plate.

Signed at New York, in the county of Kings, and State of New York, this6th day of June, 1929.

WILLIAM 'L. RICHARDS.

CHARLES J. NELSON.

